I don't think you get my point. What's 'unnecessary' is Your comment. I don't need you to tell me what to put in the comment section because If said I liked the story and every single thing about it, I would be lying. The purpose of the comment section is to comment on basically whatever.
Who gave you the vow to tell me what to comment on. I never even said I did not like the story, I said that it could be written much better and I loved everything else but the grammar. If I was bringing the author down than it's the authors job to tell me, not you!